小编Ole*_*leg的帖子

我是R的新手,无法运行功能来获得我需要的答案.我有示例数据PCSTest

http://pastebin.com/z9Ti3nHB

看起来像这样:

Date        Site            Word
--------------------------------------
9/1/2012    slashdot        javascript
9/1/2012    stackexchange   R
9/1/2012    reddit          R
9/1/2012    slashdot        javascript
9/1/2012    stackexchange   javascript
9/5/2012    reddit          R
9/8/2012    slashdot        javascript
9/8/2012    stackexchange   R
9/8/2012    reddit          R
9/8/2012    slashdot        javascript
9/18/2012   stackexchange   R
9/18/2012   reddit          R
9/18/2012   slashdot        javascript
9/18/2012   stackexchange   R
9/27/2012   reddit          R
9/27/2012   slashdot        R

我的目标是随着时间的推移寻找与网站相关的不同单词出现的趋势.我可以算一下:

library(plyr)   
PCSTest <- read.csv(file="c:/PCS/PCS Data - Test.csv", header=TRUE)
PCSTest$Date <- as.Date(PCSTest$Date, "%m/%d/%Y")
PCSTest$Date <- as.POSIXct(PCSTest$Date)
countTest <- count(PCSTest, c("Date", "Site", "Word"))

这给了这个:

                  Date          Site …

我试图了解Superpowered SDK，但对于Android和C ++以及音频信号来说都是新功能。我从这里有频域示例：https : //github.com/superpoweredSDK/Low-Latency-Android-Audio-iOS-Audio-Engine/tree/master/Examples_Android/FrequencyDomain

在我的Nexus 5X上运行。在FrequencyDomain.cpp文件中：

static SuperpoweredFrequencyDomain *frequencyDomain;
static float *magnitudeLeft, *magnitudeRight, *phaseLeft, *phaseRight, *fifoOutput, *inputBufferFloat;
static int fifoOutputFirstSample, fifoOutputLastSample, stepSize, fifoCapacity;

#define FFT_LOG_SIZE 11 // 2^11 = 2048

static bool audioProcessing(void * __unused clientdata, short int *audioInputOutput, int numberOfSamples, int __unused samplerate) {
SuperpoweredShortIntToFloat(audioInputOutput, inputBufferFloat, (unsigned int)numberOfSamples); // Converting the 16-bit integer samples to 32-bit floating point.
frequencyDomain->addInput(inputBufferFloat, numberOfSamples); // Input goes to the frequency domain.

// In the frequency domain we are working with 1024 …